JPH09181638A - Portable radio communication equipment such as portable telephone provided with pager function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a portable radio communication equipment from being a large size and heavy even when a pager function by vibration is added by incorporating a cylindrical vibration motor inside the peak part of the antenna of the portable radio communication equipment. SOLUTION: When a portable radio equipment is called from an opposite party through the antenna 8 of this portable radio communication equipment, a cylindrical microvibration motor 1 generates the vibration through a circuit inside the portable radio communication equipment. In this case, since the motor 1 is incorporated inside the peak part 16 of the antenna 8, only the peak part 16 is vibrated. Thus, when the carrying person of the portable radio communication equipment brings the peak part 16 in contact with a human body, he/she recognizes that radio calling such as a telephone call or the like from a third party is present by the vibration of the part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to fix an eccentric weight to a shaft protruding from one end of a cylindrical micromotor for energizing an armature by a commutator and a brush, and to make the eccentric weight partially eccentric. The present invention relates to a cylindrical micro-vibration motor that is caused to generate vibration when rotated, and is used for a device that requires a vibration source such as a pager (calling device) or a vibration alarm device such as a massager.

[0003]

2. Description of the Related Art For example, in a pager (so-called pager) as a calling device, in order to notify that a telephone call is made, in recent years, a vibration method is used instead of a sound. Is
Pager has generated a great demand.

However, the pager itself only informs the pager carrier that there is a call from the other party, and cannot contact the other party using the pager.

Due to the recent trend toward high-density packaging, mobile phones have been shifting to lighter, thinner, shorter, and smaller devices. The size and size of a pager are extremely light, if not small. ing. However, in portable wireless communication devices such as mobile phones and portable wireless devices of this type, sound is used as the calling method.

On the other hand, in the pager, the sound calling method alone is often disadvantageous, so the vibration calling method is also used. Therefore, attempts have been made to add a pager capable of calling by vibration to the portable wireless communication device or to incorporate a vibration generator into the portable wireless communication device.

[0007]

However, when a pager is added to or built in a portable wireless communication device,
The portable wireless communication device becomes large in size, which goes against the trend toward smaller, lighter, smaller devices. Moreover, it becomes expensive.

Although the portable radio communication device is larger than the pager, it does not have a space to house the pager.
If this space is formed, the above-mentioned drawbacks are called. Therefore,
It is considered that only the vibration generator is built into the portable wireless communication device, but it is difficult to actually secure the space for it. However, even if somehow this is solved, the portable wireless communication device Has a larger housing than a pager, so a small vibration generator like that used in a pager is built in and the housing is sufficiently practical even if it is operated. It is not possible to generate a certain vibration.

That is, the vibration generator used for the portable radio communication device cannot use the vibration generator which is inexpensive and small in general pager, and a large vibration generator or a special vibration generator is used. Has to be developed, and it becomes an expensive and large portable wireless communication device, which is not practical.

That is, an object of the present invention is to use an inexpensive and small vibration generator, which is useful for a small pager, in a portable radio communication device and to call the other party by vibrating due to vibration. The portable radio communication device is capable of generating vibration of a magnitude large enough to notify the wearer of the portable radio communication device, and the portable radio communication device is subjected to a special troublesome design change or is made large in size. It is an object of the present invention to provide a portable wireless communication device such as a portable telephone and a portable wireless device having a pager function that is inexpensive and small in size and that can generate vibrations.

[0011]

SUMMARY OF THE INVENTION An object of the present invention is to incorporate a cylindrical vibration motor 1 in the top portion 6 of an antenna 8 of a portable wireless communication device 6 such as a portable telephone or a portable wireless device. Can be achieved with.

Furthermore, in that case, the antenna 8
Is less likely to be damaged even if the design is changed to a large one, or the vibration applied to the portable wireless communication device 6 from the outside, the reliability is high, the large vibration is obtained, and the vibration is extremely fine, and the cylindrical vibration has a very fine shape. In order to make the motor 1, the cylindrical vibration motor 1 used in this case is a cylindrical micromotor 2 which is configured to energize the armature 15 by a commutator 12 and brushes 14-1 and 14-2. Cylindrical micro-vibration motor in which eccentric weights 4-1, 4-2 and 4-3 are fixed to a shaft 3 protruding from one end, and the eccentric weight is rotated while partially eccentrically rotating the eccentric weight to generate vibration. Bending prevention projections 19-1, 1 for preventing the shaft from bending beyond the elastic limit
By forming 9-2 and 19-3 at least on the outer peripheral portion of the eccentric weight on the other end surface side, a more effective sheet
It is possible to provide a mobile wireless communication device such as a mobile phone having a jar function.

[0013]

In the mobile wireless communication device 6 such as a mobile phone or a mobile wireless device having a pager function by vibration, the antenna 8 is provided in the mobile wireless communication device main body 17. This antenna 8
In many cases, the rod 18 made of a hollow pipe is configured to be expandable and contractable in the portable wireless communication device main body 17 by, for example, forming a multistage structure. Alternatively, the antenna 8 may be left outside from the portable wireless communication device body 17. Alternatively, the rod 18 portion may be built in the portable radio communication device main body 17 leaving only the botch 30.

Any type of portable radio communication device 6 may be used. When the mobile wireless communication device 6 is called by the other party via the antenna 8 of the mobile wireless communication device 6, the cylindrical micro vibration motor 1 is clarified from the following description through the circuit in the mobile wireless communication device body 17. The vibration is generated.
Here, since the cylindrical micro-vibration motor 1 is built in the top portion 16 of the antenna 8, only the top portion 16 vibrates. That is, the vibration of the cylindrical micro-vibration motor 1 does not directly vibrate the casing portion of the other portable radio communication device main body 17, but vibrates the top portion 16 in a concentrated manner.

Therefore, when the top surface of the top portion 16 is housed in the mobile wireless communication device body 17 at a surface position with the face of the mobile wireless communication device body 17, only the top surface portion of the top portion 16 vibrates. Therefore, if the carrier of the portable wireless communication device 6 makes the top 16 contact the human body, it can be known that a third party has made a wireless call, such as a telephone, due to the vibration of that portion.

When the top portion 16 is embedded in the portable radio communication device main body 17, only the top surface portion of the top portion 16 can transmit the vibration to the human body, that is, it is difficult to transmit the vibration to the human body. In the embodiment shown below, the rod 16 is provided in order to prevent the top portion 16 from protruding from the surface of the portable wireless communication device main body 17 and burying the portion.
Is a hollow botch 30 having an outer diameter larger than the tip of the bot.
The data 1 can be easily installed.

As described above, since the portion of the botch 30 projects from the main body 17 of the portable radio communication device, the botch 30 can be easily brought into contact with the human body, and the botch 30 can be manually grasped to fix the antenna 8 to the main body 17 of the mobile radio communication device. When the cylindrical micro-vibration motor 1 built into the botch 30 vibrates, the whole botch 30 vibrates, so that the human body part in contact with the botch 30 vibrates. The vibration of the botch 30 makes it possible to know that a third party has made a wireless call such as a telephone call.

In the case of the portable radio communication device 6 of the type in which the antenna 8 cannot be built in the portable radio communication device main body 17 with the antenna 8 left, or when the antenna 8 can be extended to any position. The portion of the botch 30 of the antenna 8 can be easily contacted with an appropriate portion of the human body.
When the cylindrical micro-vibration motor 1 incorporated therein vibrates, not only the botch 30 but also the rod 18 portion can be slightly vibrated, so that the human body portion in contact with these portions can be vibrated. It can be easily transmitted, and the vibration can inform that a third party has made a wireless call such as a telephone call. In particular, when the rod 18 portion of the antenna 8 is formed of a bendable material, the feature can be particularly utilized.

Although the botch 30 is formed to have a slightly larger outer diameter than the rod 18, it is desirable that the outer diameter size be as small as possible. Therefore, the botch 30 is also formed to have a relatively small outer diameter. Therefore, the cylindrical micro-vibration motor 1 incorporated in the botch 30 is also extremely fine, and the cylindrical micro-vibration is caused by vibration from the outside. It is desirable that the motor 1 always has a structure that surely generates rotational vibration without stopping.

According to the cylindrical micro-vibration motor 1 used in the present invention, at least the eccentric weight 4-1 is provided with the shaft bending preventing projection 19-1 for preventing the shaft 3 from bending beyond the elastic limit. Since it is integrally formed on the outer peripheral portion of the other end surface (the lower end surface in the drawing), the portable wireless communication device 6
Even if the (cylindrical micro-vibration motor 1) falls and is subjected to an extremely high impact, the other end surface of the shaft bending preventing projection 19-1 also serves as a stator yoke that constitutes one end surface of the cylindrical micro motor 2. The bending of the shaft 3 beyond the elastic limit which prevents the cylindrical micro vibration motor 1 from starting due to contact with one end surface of the metal housing 20 is prevented.

That is, when the cylindrical micro-vibration motor 1 is dropped, an extreme impact is applied, and in the worst state, the shaft 3 is bent to such an extent that the other end surface of the eccentric weight 4-1 slides into contact with one end surface of the housing 20. Even if it happens, the cylindrical micro-vibration motor 1 surely rotates and generates vibration, so that the cylindrical micro-vibration motor 1 with high reliability can be configured.

As described above, in the worst case, when the shaft 3 is bent to such an extent that the other end surface of the eccentric weight 4-1 comes into sliding contact with one end surface of the housing 20, the eccentric weight 4-1 is generated when the motor 1 rotates. And a sliding sound is generated due to the one end surface of the housing 20 slidingly contacting with each other. But,
The cylindrical micro-vibration motor 1 has various structural features such that the shaft 3 is bent only to such an extent that such sliding noise is actually generated even if the cylindrical micro-vibration motor 1 is dropped. Therefore, even if the shaft 3 is actually bent, the cylindrical micro-vibration motor 1 does not generate the sliding noise.

For example, even in a small cylindrical micro vibration motor 1 having a diameter size of 3 to 4 mm,
A large vibration having a diameter of 6 mm in the related art must be generated, the weight and volume of the eccentric weight cannot be simply reduced, and the axial length is formed slightly longer. In the eccentric weight 4-1 in the cylindrical micro vibration motor 1, even in such a case, the eccentric weight 4-1 is formed such that the axial length of the inner peripheral portion thereof is shortened,
The outer peripheral portion is formed to have a long axial length, and the outer peripheral portion is formed to be heavier than the inner peripheral portion.

That is, the eccentric weight 4-1 is formed by reducing the volume of the inner peripheral portion that does not contribute to the vibration efficiency, and makes the volume and weight of this portion smaller than the volume and weight of the outer peripheral portion that contributes to the vibration efficiency. Is forming. Therefore, even if the cylindrical micro-vibration motor 1 is dropped, the weight of the eccentric weight 4-1 is small and the impact of the drop is small. Therefore, the bending of the shaft 3 is small. As a result, the shaft 3 does not have to be bent until the eccentric weight 4-1 and the one end surface of the housing 20 come into sliding contact with each other as described above, so that the sliding noise is not generated.

Further, in the cylindrical micro-vibration motor 1, a shaft bending preventing projection formed on the outer peripheral portion of the other end surface of the eccentric weight 4-1 so that the eccentric weight 4-1 and one end surface of the housing 20 do not slide. Since a concave portion (a concave portion for storing the shaft retaining boss) 21 for accommodating the shaft retaining boss 9 is formed in the inner peripheral portion of the shaft bending preventing protrusion 19-1 by 19-1, At the position, the shaft 3 is engaged with the shaft retaining boss 9.

As a result, since the gap length between the eccentric weight 4-1 and the one end surface of the housing 20 is shortened, the bending degree of the shaft 3 is extremely small even when the cylindrical micro vibration motor 1 is dropped.

The shaft bending preventing projection 19-
1 and the recess 23 formed in the center of the other end of the brush base 22 which doubles as the position of the recess 21 formed by the eccentric counter 4-1 and the lid of the other end of the cylindrical micromotor 2.
Since the shaft retaining boss 24 is engaged with the shaft 3 at that position, as a result, even when the cylindrical micro vibration motor 1 rotates, the amount of movement of the rotor in both axial directions is restricted. It Therefore, similarly to the above, it is not necessary to form a long air gap between the eccentric weight 4-1 and the one end surface of the housing 20, so that the degree of bending of the shaft 3 is extremely small even when the micro vibration motor 1 is dropped.

At the same time, since the amount of movement of the rotor in both axial directions is regulated, the armature 15 is slidably contacted with the main body of the cylindrical micromotor 2 (metal housing 20), and the armature 15 is disconnected. It is possible to obtain the cylindrical micro-vibration motor 1 which has a small amount of play in the sliding relationship between the brush 14 and the commutator 12 and has a good starting quality and low sliding noise, that is, low noise.

[0029]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an antenna 8 as an embodiment of the present invention.
2 is a front view of the portable wireless communication device 6 with the antenna 8 housed therein, FIG. 2 is an external perspective view of the portable wireless communication device 6 with the antenna 8 pulled out, and FIG. 3 shows the cylindrical micro vibration motor 1 in the botch 30. A partially cutaway perspective view of the top portion of the built-in antenna 8, FIG. 4 is a longitudinal sectional view of the same, and FIG. 5 is a cylindrical micromotor (cup-shaped coreless motor) 2 used as an example.
7 is a longitudinal sectional view of a cylindrical micro-vibration motor 1 using FIG. 6, FIG. 6 is an exploded perspective view of the cylindrical micro-vibration motor 1, and FIG.
Is an explanatory view of another eccentric weight 4-2 used in the cylindrical micro-vibration motor 1, and FIG. 8 is an explanatory view of an eccentric weight 4-3 showing still another example. A portable wireless communication device 6 having a pager function by vibration using a cylindrical micro-vibration motor 1 as one embodiment will be described below with reference to FIGS. 1 to 8.

With reference to FIGS. 1 and 2, a portable radio communication device 6 such as a portable telephone and a portable radio device having a pager function by vibration shown in this embodiment has a touch-tone dial unit 31 on its front face. , A display unit 32 and a transmitter / receiver unit 33, and a wireless antenna 8 is attached to the top of the portable wireless communication device body 17 so as to be stored therein. In the case of FIG. 1, the case where the antenna 8 is housed in the portable wireless communication device main body 17 is shown, and in the case of FIG. 2, the case where the antenna 8 is pulled out from the portable wireless communication device main body 17 is shown.

The rod 18 constituting the antenna 8 has a hollow inside, and the top 16 portion thereof is the rod 1 described above.
Even when the antenna 8 is housed in the portable wireless communication device body 17, the botch 30 portion is not embedded in the portable wireless communication device body 17 even if the antenna 8 is housed in the portable wireless communication device body 17. ing.

The material of the antenna 8 is not particularly limited, but it is formed of a material and a structure that allows it to be slightly bendable so long as the antenna 8 can be built in the portable radio communication device main body 17. It may be a multi-stage structure that can expand and contract, or a structure that does not expand and contract.

The botch 30 provided on the top portion 16 of the rod 18 has a hollow interior, and an ultrafine cylindrical microvibration motor 1 having an outer diameter of 3 to 4 mm so that it can be embedded therein. Built-in, the cylindrical micro vibration mode
The lead wires 34-1 and 34-2 electrically connected to the terminals 27-1 and 27-2 of the terminal 1 are passed through the rod 18 and the electric circuit (not shown) in the main body 17 of the portable radio communication device. Leading to.

Any suitable method may be used to form the botch 30 on the top portion 16 of the rod 18. In this embodiment, the botch bottom cover 36 having a through hole communicating with the hollow portion 35 of the rod 18 is attached to the rod 18. Fixed to the top 16 part of
By holding the cylindrical micro-vibration motor 1 by the botch bottom cover 36 and closing the upper part of the botch bottom cover 36 with a cup-shaped lid body 37, a cylinder having a hollow interior at the top 16 of the rod 18 is formed. A botch 30 having a shaped micromotor 1 housing is formed.

A cylindrical micro-vibration motor 1 which can be built in the botch 30 having a small outer diameter size and which is not easily damaged by vibration is built-in. An ultra-fine shape having a structure suitable for this. An example of the cylindrical micro vibration motor 1 will be described below with reference to FIGS.

The cylindrical micro-vibration motor 1 used here
Is a cylindrical microcoreless vibration motor.
The cylindrical micro-vibration motor 1 has a cylindrical coreless armature 15, a commutator hub 13, a commutator 12 composed of a commutator piece formed on the commutator hub 13, and the other end fixed to the commutator hub 13. It has a rotor consisting of the shaft 3. The cylindrical micromotor casing 5 made of a magnetic material is composed of a stator yoke / metal housing 20 having a through hole in the axial direction for allowing the shaft 3 to pass through the openings at both ends and a brush stand 22 made of resin. By closing, the cylindrical micromotor 2 having a diameter of 4 mm is formed.

The metal housing 20 has such a structure so as to serve as a lid for closing one end of the cylindrical motor housing 5, and is fixed to the one end opening of the motor housing 5 by means such as press fitting. Has been done.

First, the metal housing 20 is made of a magnetic material so as to function as a stator yoke of a cylindrical field magnet 11 described later. A recess for accommodating the sleeve bearing 7 is formed at the center of one end of the housing 20, and the sleeve bearing 7 slightly protruding in the direction of the one end from the surface of the one end of the housing 20 is embedded in the recess. The diameter gradually decreases in the direction of the part, and the lower end portion integrally forms a cylindrical stator yoke portion 25 having an outer diameter having an inner diameter hole that substantially matches the inner diameter hole of the field magnet 11.

Then, the other end opening of the motor housing 5 is closed by a brush base 22 made of resin to form a cylindrical micro body 26, thereby forming a cylindrical micro motor 2.

The lead wire 19 is attached to the brush base 22.
And a pair of brushes 14 mounted on the pair of brush holding protrusions formed on the brush base 22 through which the pair of electrodes 27-1 and 27-2 for supplying positive and negative power supplies are inserted. -1, 14-2 are attached, and the brushes 10-1, 1 are attached.
0-2 is in sliding contact with a commutator 12 formed of a group of commutator pieces mounted on the shaft 3. The commutator 12 is an electrically insulating heat-shrinkable tube 28 formed on the outer circumference of the shaft 3.
Is formed on the outer periphery of.

A two-pole cylindrical field magnet 11 having N-pole and S-pole magnetic poles in the circumferential direction is fixed to the outer periphery of the cylindrical stator yoke portion 25 by means such as adhesion, and the cylindrical micro-magnet is formed. The cylindrical coreless armature 15 having the other end fixed to the outer periphery of the commutator hub 13 attached to the shaft 3 passing through the substantially central portion of the motor body 26 is provided at the center of the metal housing 20 through a radial gap. The sleeve bearing 7 mounted on the portion is adapted to rotate relative to the field magnet 11.

The coreless armature 15 and the commutator pieces forming the commutator 12 are appropriately electrically connected, and are electrically connected to a positive power supply terminal and a negative power supply terminal (not shown). The coreless armature 15 is energized in an appropriate direction through the terminals 27-1 and 27-2, the brushes 14-1 and 14-2, and the commutator 12, and the coreless armature 15 is moved according to Fleming's left-hand rule. Rotate in a predetermined direction. It should be noted that each of the terminals 27-1 and 27-2 (not shown in FIGS. 3 and 4 for convenience of drawing)
As shown in FIGS. 3 and 4, lead wires 34-1 and 34-2 are provided.
Are electrically connected. Lead wires 34-1, 34-
2 is connected to an electric circuit (not shown) in the main body 17 of the portable wireless communication device through the hollow portion 18 in the rod 18.

An eccentric weight 4 made of a metal having a high specific gravity such as tungsten or an alloy thereof having an eccentric and eccentric center of gravity is provided on a shaft 3 protruding from one end of a cylindrical coreless micromotor 2 through a liner 10. -1 is fixed by means such as press fitting, crimping, or adhesion.

This eccentric weight 4-1 is integrally formed with the shaft bending preventing projection 19-1 in order to prevent the shaft 3 from bending beyond the elastic limit.
1 is formed on the outer peripheral portion of the other end surface of the cylindrical micro-vibration motor 1, and the other end surface of the shaft bending preventing projection 19-1 is a metal of one end surface of the cylindrical micro-motor 2 even when an extremely high impact is applied when the cylindrical micro-vibration motor 1 is dropped. The end face of the housing 20 is brought into contact with the end face of the housing 20 to prevent bending of the shaft 3 beyond the elastic limit, which would prevent the cylindrical micro-vibration motor 1 from starting.

As described above, in the worst case, when the shaft 3 is bent to such an extent that the other end surface of the eccentric weight 4-1 comes into sliding contact with the one end surface of the housing 20, the eccentric weight 4-1 is generated when the motor 1 rotates. And a sliding sound is generated due to the one end surface of the housing 20 slidingly contacting with each other. But,
The cylindrical micro-vibration motor 1 has various structural features such that the shaft 3 is bent only to such an extent that such sliding noise is actually generated even if the cylindrical micro-vibration motor 1 is dropped. Therefore, even if the shaft 3 is actually bent, the cylindrical micro-vibration motor 1 does not generate the sliding noise.

The eccentric weight 4-1 has an inner peripheral portion formed to have a short axial length and an outer peripheral portion formed to have a large axial length so that the outer peripheral portion has a weight smaller than that of the inner peripheral portion. It is heavily formed. That is, the eccentric weight 4-1 is formed such that the volume of the inner peripheral portion that does not contribute to the vibration efficiency is made small, and the volume and weight of this portion are made smaller than the volume and the weight of the outer peripheral portion that contributes to the vibration efficiency. There is.

The eccentric weight 4-1 and the housing 20
The eccentric weight 4 described above so that one end surface of the
-1 by the shaft bending prevention projection 19-1 formed on the outer peripheral portion of the other end surface of the shaft -1.
Since a concave portion (a concave portion for storing the shaft retaining boss) 21 for accommodating the shaft retaining boss 9 is formed in the inner peripheral portion of 1, the shaft retaining boss 9 is engaged with the shaft 3 in the concave portion 21. Eccentric weight 4-1
The gap length between the one end surface of the housing 20 and the one end surface of the housing 20 is shortened.

A shaft retaining boss 24 is engaged with the shaft 3 via a liner 29 at a position of a recess 23 formed in the central portion of the other end of the brush base 22. Even when the vibration motor 1 rotates, the amount of movement of the rotor in the direction of both shaft ends is regulated so that the gap length between the eccentric weight 4-1 and the one end surface of the housing 20 does not become long, and at the same time, the armature. 1
The metal 5 does not come into sliding contact with the metal housing 20.

The eccentric weight 4-2 shown in FIG. 8 may be used as the eccentric weight. This eccentric weight 4
-2 is slightly different from that of FIG. 5 in the structure of the shaft removal preventing boss 19-2 of the eccentric weight 4-2. In this eccentric weight 4-2, an annular shaft retaining boss 19-2 is integrally formed concentrically with the shaft 3 at the lower end thereof. Shaft retaining boss 1
The purpose and conditions of 9-2 are as follows:
It is similar to 9-1. FIG. 8 shows yet another eccentric weight 4-3, and the structure of the shaft retaining boss 19-3 of the eccentric weight 4-3 is slightly different from that shown in FIG. In this eccentric weight 4-3, an annular shaft retaining boss 19-3, which is separately formed concentrically with the shaft 3, is formed at the lower end of the eccentric weight 4-3 by an appropriate means such as an adhesive. It is fixed to. The purpose and conditions of the shaft retaining boss 19-3 are:
It is the same as the shaft retaining bosses 19-1 and 19-2.

[0050]

[Effect] In the portable wireless communication device of the present invention, vibration caused by vibration
Even if the jar function is added, the portable wireless communication device itself can be made compact and lightweight by adding it, and since the main body of the portable wireless communication device is not changed significantly, mass production can be performed at low cost.

Moreover, the cylindrical micro-vibration motor used as an example has a super-fine shape and excellent seismic resistance, so that it can be installed in the top of the antenna very easily.

In particular, in the above-mentioned cylindrical micro vibration motor, even if the diameter (outer diameter) size is extremely small, the shaft has a very high impact resistance due to the impact given at the time of dropping and causes a self-start failure. Since no bending occurs, a highly reliable portable wireless communication device can be configured.

Not only is the impact resistance high, but the eccentric weight has a small outer diameter, and the portion that does not contribute to vibration efficiency is removed to increase the portion that contributes to vibration efficiency. Although it exists, it is inexpensive and still generates high vibration. Moreover, since the bending of the shaft 3 is extremely small, it is possible to obtain a highly reliable cylindrical micro-vibration motor that does not generate high noise and disconnection of the armature. That is, it is possible to configure a portable radio communication device having a vibration as a pager mechanism by a micro vibration cylinder having an ultrafine shape with high reliability and excellent vibration resistance.

[Brief description of the drawings]

FIG. 1 is a front view of a portable wireless communication device in a state where an antenna according to an embodiment of the present invention is housed.

FIG. 2 is an external perspective view of the portable wireless communication device with the antenna pulled out.

FIG. 3 is a partially cutaway perspective view of a top portion of an antenna having a cylindrical micro vibration motor built in a botch.

FIG. 4 is a vertical sectional view of the same.

FIG. 5 is a vertical cross-sectional view of a cylindrical micro vibration motor using a cylindrical micro motor (cup type coreless motor) used as an example.

FIG. 6 is an exploded perspective view of the cylindrical micro vibration motor.

FIG. 7 is an explanatory diagram of another eccentric weight used in the cylindrical micro vibration motor.

FIG. 8 is an explanatory diagram of an eccentric weight 4-3 showing still another example.

[Explanation of symbols]

1 Cylindrical Micro Vibration Motor (Cylindrical Vibration Motor) 2 Cylindrical Micro Motor 3 Shaft 4-1, 4-2, 4-3 Eccentric Weight 5 Motor Housing 6 Portable Wireless Communication Device 7 Sleeve Bearing 8 Antenna 9 Shaft Missing Stop boss 10 Liner 11 Field magnet 12 Commutator 13 Commutator hub 14, 14-1, 14-2 Brush 15 Cylindrical coreless armature 16 Top part 17 Portable radio communication device main body 18 Rod 19-1, 19-2, 19 -3 Shaft Bend Prevention Protrusion 20 Stator Yoke and Metal Housing 21 Shaft Detachment Boss Recessed Concavity 22 Brush Stand 23 Recess 24 Shaft Detachment Boss 25 Cylindrical Stator Yoke 26 Cylinder Micromotor Main Body 27-1, 27-2 Electrode 28 Heat shrink tube 29 Liner 30 Bocchi 31 Touch-tone dial 32 Display section 33 Transmitting / receiving section 34-1, 34-2 Lead wire 35 Hollow part 36 Bocch bottom cover 37 Cup type cover

Claims (2)

[Claims] 1. A cylindrical vibration motor (1) is built in a top portion (16) of an antenna (8) of a mobile wireless communication device (6) such as a mobile phone and a mobile wireless device. -A portable wireless communication device such as a mobile phone having a JA function. 2. The cylindrical vibration motor (1) comprises a commutator (12) and brushes (14-1, 14-2) for energizing an armature (15). The eccentric weights (4-1, 4-2, 4-3) are fixed to the shaft (3) protruding from one end of 2), and the eccentric weights are rotated while partially eccentric to generate vibrations. It is a cylindrical micro-vibration motor which is designed to prevent bending of the shaft beyond the elastic limit. Shaft bending prevention protrusions (19-1, 19-2, 19-
3. A portable wireless communication device such as a mobile phone having a pager function according to claim 1, wherein 3) is formed at least on the outer peripheral portion of the eccentric weight on the other end surface side.